AI Inference Platform Engineer

drweng · Chicago · Chicago, IL, United States

DRW is a diversified trading firm with over 3 decades of experience bringing sophisticated technology and exceptional people together to operate in markets around the world. We value autonomy and the ability to quickly pivot to capture opportunities, so we operate using our own capital and trading at our own risk. Headquartered in Chicago with offices throughout the U.S., Canada, Europe, and Asia, we trade a variety of asset classes including Fixed Income, ETFs, Equities, FX, Commodities and Energy across all major global markets. We have also leveraged our expertise and technology to expand into three non-traditional strategies: real estate, venture capital and cryptoassets. We operate with respect, curiosity and open minds. The people who thrive here share our belief that it’s not just what we do that matters–it's how we do it. DRW is a place of high expectations, integrity, innovation and a willingness to challenge consensus. About the Role  We're looking for an AI Inference Platform Engineer to build, operate, and optimize the systems that serve large language, vision, multimodal, and embedding models across DRW. This role provides DRW's firmwide interface to modern AI models, from early evaluation through reliable production use.  You'll work across inference runtimes, distributed systems, and production platform engineering, with deep GPU literacy.  You'll own the serving platform end-to-end: onboarding newly released models, measuring quality and performance equivalence across serving configurations, scheduling workloads across tenants, and continuously improving latency, throughput, utilization, reliability, and cost across the inference fleet.  What You'll Do  <ul> <li>Optimize LLM inference performance across modern NVIDIA GPU architectures and inference runtimes. </li> <li>Build end-to-end performance profiling and observability to identify bottlenecks from individual GPU kernels through multi-node inference systems. </li> <li>Design and optimize KV cache and distributed inference architectures, including caching, routing, memory tiering, and prefill/decode strategies. </li> <li>Own day-0 model onboarding, determining the appropriate runtime, precision, sharding, memory, batching, cache policy, and serving configuration for new models. </li> <li>Maintain validated performance profiles for important model and hardware combinations, including performance and quality regression testing. </li> <li>Measure and monitor quality equivalence across serving configurations, including KV cache quantization, speculative decoding acceptance thresholds, precision choices, and model routing, so in-house serving can be trusted to match reference-model quality on production workloads. </li> <li>Manage the production serving lifecycle of models, including versioning, compatibility, staging, canarying, promotion, rollback, and retirement. </li> <li>Partner with SRE and platform teams to automate model deployment, distribution, production readiness, observability, and reliable operation across environments. </li> <li>Optimize model placement, scaling, and resource allocation across the

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